Can a 17-year-old legally move out without their parents' permission if they are still in high school?

Can a 17-year-old legally move out without their parents' permission if they are still in high school?

Generally, no. The age of majority in most US states and Western countries is 18. That's when you're considered a legal adult and you can make all your own decisions. In some cases a minor can be legally emancipated, but if you're still in high school it is unlikely that you will be granted emancipation.